[Billfred]

Well, a bit over a year later, I've done it.

My camp did Jeopardy night, and I created the buzzer system with one RCX, three touch sensors (three teams), a remote, and lots of motor wire. (The extra sensor and the long motor wires were lifted from other kits.)

Here's how we did it: at the start of the program, the display read 1293. (I needed a number, so I just put the first one that came to mind.) When a sensor was pressed, it checked a variable. If it was 0, the variable changes to one and changes the screen to read that buzzer number. If the sensor is one, it does nothing. When the remote sends a message of 1, the variable goes to zero and the display goes back to 1293.

It worked flawlessly--although the switches and longer wires wouldn't hurt if you were making something more polished.